For reasons not relevant to this problem I'm making a new hub for the steering wheel of my old banger.
The steering column is made of 1" OD x .73" bore mild steel tube. The part of the light alloy hub that fits to the steering column is 1.5" OD and bored 2.25" deep as a light push fit onto the steering column. The hub and column are cross drilled 5/16", about the middle of the bore, nominally diametrically. Flats are machined on the OD of the hub for seating the nut and bolt (actually a nice snug fitting stud and two dome nuts) that clamp the hub to the column.
The cross holes are appreciably off centre so I need to drill the new hub to match the holes in the column but I don't mind having a bit of clearance between the end of the column and the bottom of the bore.
Any bright ideas?